Trimmer Resistors

What are trimmer potentiometers?


Trimmer potentiometers, sometimes referred to as trim pots or trimmer resistors are a type of adjustable potentiometer (variable resistor). They are used to calibrate and fine-tune circuits. Trimmer potentiometers are typically constructed from cermet or have a carbon composition. They can be mounted directly onto PCBs (printed circuit boards).


Trimmer potentiometers are not adjusted very frequently. You can think of them as a ’set and forget’ component. Trim pots let you set (or trim) the resistance to obtain a very precise current, output voltage or gain. Once the value has been set, it is unlikely that you’ll need to adjust the trimmer again unless you need to recalibrate the circuit.


Can I replace a normal potentiometer with a trimmer potentiometer?


Yes, you can. However, trimmer potentiometers are typically more expensive than standard potentiometers with a fixed resistance rating. It is also worth bearing in mind the difference in lifespan too. Many potentiometers have a lifespan that allows for hundreds of thousands of cycles. Trimmer potentiometers typically have a lifespan of a few hundred cycles (at best). Trim pots also tend to take up more space on a PCB than a standard potentiometer.


Do I need a single turn or multiturn trim pot?


This completely depends on the intended application of the trim pot. Multiturn trimmer pots tend to have a higher resolution than single turn models. A single turn trimmer potentiometer is ideal for applications where a resolution of one turn is enough.


Adjustment types


Trimmer potentiometers are normally adjusted by hand (you can turn the adjustment knob with your fingers), with a screwdriver or with a specialised adjustment tool designed for use with a particular model or series.


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Description Price Maximum Resistance Mounting Type Number of Turns Orientation Power Rating Series Termination Style Length Tolerance Depth Temperature Coefficient Height Dimensions Maximum Voltage Rating
RS Stock No. 186-047
Mfr. Part No.M70Y502KB25
BrandVishay
TWD2,363.00
Each
units
5 kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9513
Mfr. Part No.M70Y502KB25
BrandVishay
TWD1,650.50
Each (In a Box of 50)
units
5 kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 850-9678
Mfr. Part No.T73YP504KT20
BrandVishay
TWD18.40
Each (In a Pack of 1000)
units
500 kΩ Through Hole 1 Top Adjust 0.18W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 186-053
Mfr. Part No.M70Y103KB25
BrandVishay
TWD2,363.00
Each
units
10 kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 162-243
Mfr. Part No.M43P203KB40
BrandVishay
TWD75.00
Each
units
20 kΩ Through Hole 20 Side Adjust 1/2W 43P Pin 20.57mm ±10% 4.83mm ±100ppm/°C 6.35mm 20.57 x 4.83 x 6.35mm -
RS Stock No. 167-9514
Mfr. Part No.M70Y103KB25
BrandVishay
TWD1,650.50
Each (In a Box of 50)
units
10 kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 169-3025
Mfr. Part No.M43P203KB40
BrandVishay
TWD59.70
Each (In a Box of 200)
units
20 kΩ Through Hole 20 Side Adjust 0.5W 43P Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 154-2757
Mfr. Part No.M43P205KB40
BrandVishay
TWD74.00
Each
units
2 MΩ Through Hole 20 Side Adjust 1/2W 43P Pin 20.57mm ±10% 4.83mm ±100ppm/°C 6.35mm 20.57 x 4.83 x 6.35mm -
RS Stock No. 186-031
Mfr. Part No.M70Y202KB25
BrandVishay
TWD2,034.00
Each
units
2 kΩ Through Hole 20 Side Adjust 0.5W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 162-2386
Mfr. Part No.M70Y202KB25
BrandVishay
TWD1,556.70
Each (In a Box of 50)
units
2 kΩ Through Hole 20 Side Adjust 0.5W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 169-3111
Mfr. Part No.M43P205KB40
BrandVishay
TWD53.60
Each (In a Box of 200)
units
2 MΩ Through Hole 20 Side Adjust 0.5W 43P Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 850-9372
Mfr. Part No.TS63Y504KR10
BrandVishay
TWD82.10
Each (In a Pack of 500)
units
500 kΩ Surface Mount 14 Top Adjust 0.13W TS63 Solder 6.85mm ±10% - ±100ppm/°C - - -
RS Stock No. 162-221
Mfr. Part No.M43P502KB40
BrandVishay
TWD97.00
Each
units
5 kΩ Through Hole 20 Side Adjust 1/2W 43P Pin 20.57mm ±10% 4.83mm ±100ppm/°C 6.35mm 20.57 x 4.83 x 6.35mm -
RS Stock No. 850-9625
Mfr. Part No.T73XX103KT20
BrandVishay
TWD33.00
Each
units
10 kΩ Through Hole 1 Side Adjust 0.5W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 169-3023
Mfr. Part No.M43P502KB40
BrandVishay
TWD68.50
Each (In a Box of 200)
units
5 kΩ Through Hole 20 Side Adjust 0.5W 43P Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 169-3027
Mfr. Part No.M43P104KB40
BrandVishay
TWD77.50
Each (In a Box of 200)
units
100 kΩ Through Hole 20 Side Adjust 0.5W 43P Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 850-9653
Mfr. Part No.T73YP103KT20
BrandVishay
TWD30.00
Each
units
10 kΩ Through Hole 1 Top Adjust 0.5W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 162-2381
Mfr. Part No.M70Y203KB25
BrandVishay
TWD333.70
Each (In a Box of 50)
units
20 kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 186-069
Mfr. Part No.M70Y203KB25
BrandVishay
TWD593.00
Each
units
20 kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 486-7497
Mfr. Part No.TS53YL102MR10
BrandVishay
TWD66.40
Each (In a Pack of 5)
units
1 kΩ Surface Mount 1 Top Adjust 0.25W TS53 J-Hook 5mm ±20% - ±100ppm/°C - - -